Sharp Kabushiki Kaisha Corporation

Sharp Kabushiki Haisha

Atsushi Shimonaka

Hidenori Kawanishi

Mototaka Taneya

Tatsuya Morioka

Haruhisa Takiguchi

Fumihiro Konushi

Toshihiro Inooka

Keiji Kumatani

Seiki Yano

Kazuhiro Emoto

Takuma Hiramatsu

Naoyuki Morimoto

A device including a semiconductor laser device having a semiconductor laser chip, and a molded resin having a light diffusion capability. The semiconductor laser chip is covered with the molded resin.

Semiconductor laser device, optical transmission device, optical transmission system, electronic device, control device, connector, communication device, and optical transmission method and data transmission and reception method

A light source device for radiating a stimulated emission from a semiconductor laser to outside via a multiple scattering optical system, which system has a first region located adjacent to the semiconductor laser and a second region that abuts on the first region and reaches the outside. The first region contains scatterers at a higher density than the second region does. The light source device has an amount of near-field pattern speckles &#x3c3;of 3&#xd7;10or more. The second region may have a lens portion as a magnifier for at least a principle part of a secondary planar light source formed at an interface between the first and second regions.

Light source device and optical communication module employing the device

A highly sensitive and inexpensive spatial optical transmission system using an LD (Laser Diode) as a light source and making use of the characteristics of a light receiving element is provided. The system includes a laser chip oscillating a laser beam, and a light receiving element receiving and converting to an electric signal the laser beam emitted from the laser chip and propagated through a space. The laser chip oscillates a laser beam having a wavelength of which absorption coefficient at the light receiving element is in a range of 0.001 to 0.3 &#x3bc;m.

Semiconductor laser module, spatial optical transmission system and electronic appliance

A semiconductor laser device includes a semiconductor laser chip, and a molded resin having a light diffusion capability. The semiconductor laser chip is covered with the molded resin.

SEMICONDUCTOR LASER DEVICE, OPTICAL TRANSMISSION DEVICE, OPTICAL TRANSMISSION SYSTEM, ELECTRONIC DEVICE, CONTROL DEVICE, CONNECTOR, COMMUNICATION DEVICE, AND OPTICAL TRANSMISSION METHOD AND DATA TRANSMISSION AND RECEPTION METHOD

A semiconductor laser device with a spot-size converter includes at least a semiconductor laser region emitting light from an end facet thereof and a light waveguide region. The semiconductor laser region and the light waveguide region are integrated on a semiconductor substrate in a horizontal direction. A semiconductor layer is buried in a junction region between the semiconductor laser region and the light waveguide region.

Semiconductor laser device withspot-size converter and method for fabricating the same

A semiconductor laser element includes: a semiconductor laser region in which at least one laser emission portion including an active layer for emitting light is provided; a multimode interference region including a first wave-guiding layer, one end of the first wave-guiding layer being optically coupled to the active layer of the at least one laser emission portion; and an output waveguide region including a second wave-guiding layer, the second wave-guiding layer being optically coupled to another end of the first wave-guiding layer, wherein the active layer of the at least one laser emission portion, the first wave-guiding layer, and the second wave-guiding layer are integrally formed.

Semiconductor laser element and electronic device using the same

A surface of a molded resin is entirely or partially roughened, and the light is diffused by the roughened portion. Alternatively, a cap and a glass cap having a light-diffusive function are integrated together with a resin. Alternatively still, a resin section formed of a resin material in which another resin material having a different refractive index from that of the first resin material is mixed, or a resin formed of a birefringent resin material, is provided so as not to contact a laser chip, and the light is diffused by the resin section. Alternatively still, an area formed of a resin material in which another resin material having a different refractive index from that of the first resin material is mixed, or an area formed of a birefringent resin material, is provided so as not to contact the laser chip, and the light is diffused by the area.

Semiconductor laser device and its manufacturing method, and optical communication system and optical sensor system

An integrated optical circuit device includes: a first optical element section including first and second element regions deposited along a thickness direction; a second optical element section formed away from the first optical element section; and a multimode interference region provided between the first and second optical element sections, the multimode interference region including a buried portion formed along a light propagation direction. The first and second optical element sections are optically coupled to each other via the multimode interference region.

Integrated optical circuit device and method for producing the same

An integrated optical circuit device includes: a first optical element section including first and second element regions deposited along a thickness direction; a second optical element section formed away from the first optical element section, and a multimode interference region provided between the first and second optical element sections, the multimode interference region including a buried portion formed along a light propagation direction. The first and second optical element sections are optically coupled to each other via the multimode interference region.

The waveguide type optical integrated circuit element of this invention includes: a semiconductor laser of an end face output type; and an optical waveguide for propagating output light from the semiconductor laser, the optical waveguide including a plurality of semiconductor layers, the semiconductor laser and the optical waveguide being integrally formed side by side on a semiconductor substrate, wherein a single semiconductor layer is buried in an interface area between the semiconductor laser and the optical waveguide.

Waveguide type optical integrated circuit element and method for fabricating same

Waveguide type optical integrated circuit element and method for

The integrated optical control element of this invention includes: a first waveguide for allowing light incident from outside to propagate therein; a multilayer structure for allowing the light which has propagated in the first waveguide to be incident thereon and for transmitting the light therethrough or reflecting the light therefrom, the multilayer structure including at least one layer having a refractive index different from an equivalent refractive index of a region with which the at least one layer is in contact; and a second waveguide for receiving at least part of the light transmitted through or reflected from the multilayer structure.

Integrated optical control element and a method for fabricating the same

An optical circuit element has a beam splitter which is formed with a plurality of grooves in optical waveguides, or formed in such a manner that the central axes of the waveguides to be coupled are set off from one another or the shape of the waveguides is modified. Further, an integrated type optical circuit device include: an optical circuit element having a plurality of optical waveguides on the input side and having a beam splitter which is formed with a plurality of grooves in the optical waveguides to split the light guided through the optical waveguides: and plural kinds of input light generating sources each arranged corresponding to one of the optical waveguides on the input side.

Optical circuit element and an integrated type optical circuit device

An optical data reading method and apparatus for photoelectrically converting reflection light of a laser beam radiated onto a recording medium and thereby reproducing digital data recorded in the recording medium, performing a coherent detection by photoelectrically converting a first laser beam having a light frequency .nu..sub.1 and a second laser beam having a light frequency .nu..sub.2, where .nu..sub.1 -.nu..sub.2 .gtoreq.R (R: rate of reading the digital data), in a state where wavefronts of the first and second laser beams are aligned with each other, detecting temporal changes of either an amplitude or a phase of a beat signal component of the first and second laser beams, having a frequency of (.nu..sub.1 -.nu..sub.2) and being included in an photoelectrically converted output, and reading the digital data recorded in the recording medium based on a result of detection.

Growing community of inventors

Nara, Japan

Atsushi Shimonaka